diff --git a/requirements.txt b/requirements.txt
index d028f82..5df6384 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ googleapis-common-protos==1.5.3
 grpcio==1.16.0
 gunicorn==19.9.0
 idna==2.7
-isort==4.3.4
+isort==5.3.0
 lazy-object-proxy==1.3.1
 mccabe==0.6.1
 protobuf==3.6.1